Geophysical methods help to assess potential groundwater extraction sites
Geophysikalische Methoden zur Bewertung potenzieller Standorte für die Grundwassergewinnung
Kallesøe, Anders Juhl
Kirsch, Reinhard
Pechnig, Renate
Skowronek, Frank
DOI: https://doi.org/10.1007/s00767-021-00495-x
Persistent URL: http://resolver.sub.uni-goettingen.de/purl?gldocs-11858/10657
Persistent URL: http://resolver.sub.uni-goettingen.de/purl?gldocs-11858/10657
Wiederhold, Helga; Kallesøe, Anders Juhl; Kirsch, Reinhard; Mecking, Rebekka; Pechnig, Renate; Skowronek, Frank, 2021: Geophysical methods help to assess potential groundwater extraction sitesGeophysikalische Methoden zur Bewertung potenzieller Standorte für die Grundwassergewinnung. In: Grundwasser, Band 26, 4: 367 - 378, DOI: 10.1007/s00767-021-00495-x.
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Complex geology in glacial terrain makes groundwater exploration challenging for water supply companies. Abrupt lateral changes of geological conditions, for example, raise the risk of unsuccessful exploration drilling. At some locations, local water supply companies experience a large number of dry wells, raising the need for better exploration approaches. The use of geophysical techniques enables the detection and characterization of subsurface structures in terms of aquifers and aquitards.
We present two examples in which seismic and resistivity methods are combined for subsurface characterization. A thrust structure is detected in the Varde study area in Denmark and a channel structure is mapped in the Hamburg-Sülldorf study area in Germany. The different imaging characteristics of seismic P‑ and S‑waves are demonstrated. The combination of seismic and resistivity methods enables delineating groundwater-bearing and groundwater-barrier layers down to a depth of 150 m.